| All Patents in class 418/138 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 34,393 | Feb. 11, 1862 | A. Campbell, J. Clayton | Rotary Steam Engine |
| | 208,298 | Sep. 24, 1878 | J. Darling | Rotary- Engines |
| | 440,125 | Nov. 11, 1890 | A.D. Baker | Rotary Engine |
| | 445,038 | Jan. 20, 1891 | S.G. Brosius | Rotary Steam Engine |
| | 463,267 | Nov. 17, 1891 | S.G. Brosius | Rotary Steam Engine |
 | 616,643 | Dec. 27, 1898 | E.B. Tree | Rotary Engine |
 | 711,239 | Oct. 14, 1902 | E.B. Tree | Rotary Engine |
 | 1,143,200 | Jun. 15, 1915 | H. McClelland, I.J. Johnson | Rotary Pump |
 | 1,187,628 | Jun. 20, 1916 | I.J. Johnson | Rotary Pump |
